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Yes, it was done many times in the old days..Back then 1/2 inch cranks were about the most that was available for a price you could afford.
1/2 by 7/16 gave you 315 ci...Now days you can get any stroke you are clever enough to fit in the crankcase....A better solution now is to first off, use an 8ba block. They generally will stand slightly bigger bores safely..3 3/8 plus .030 is a safe limit leaving enough for a couple cleanups..This does not require sleeves..It is definetly recommended to have the block sonic checked first.
I am currently collecting parts for a 346 ci flathead...This will have a one inch crank. RPM limits are not the factor they were in the old days what with modern forged pistons, H beam rods and titanium valves.
Our last engine (323 ci) would turn 7000 twice a lap all day if need be.
Head gaskets are not the problem they were with big bores in the old days either..We have modern O-ring technology that the overhead engines have been using for years.